What does IDE (UDMA mode 1) represent?

IDE (UDMA mode 1) is an Ultra DMA transfer mode of the Parallel ATA interface, used mainly in older PATA devices, defining a theoretical maximum transfer rate of about 25 MB/s.

How is a megabyte/second (SI definition) different from other megabyte units?

A megabyte per second (SI def.) equals one million bytes transferred each second, based on decimal units, differing from binary-based mebibyte per second units.

Why convert from IDE (UDMA mode 1) to megabyte/second (SI)?

Converting to megabyte/second (SI) allows clearer comparison and reporting in standardized decimal units commonly used in modern data throughput metrics.

How to Convert from IDE (UDMA mode 1) to Megabyte/second (SI def.)?

Learn to convert data transfer rates from IDE (UDMA mode 1), a vintage ultra DMA mode, to megabyte per second (SI definition) units for clearer measurement and comparison.

IDE (UDMA mode 1)

Megabyte/second (SI def.)

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IDE (UDMA mode 1) to Megabyte/second (SI def.) Conversion Table

IDE (UDMA mode 1)	Megabyte/second (SI def.)

Custom Unit Conversion Table Generator – Instant Printable Conversion Tables

Start Value

Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.

End Value

Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.

Interval

Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.

IDE (UDMA mode 1) to Megabyte/second (SI def.) Conversion Table
IDE (UDMA mode 1)	Megabyte/second (SI def.)

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What Is This Tool?

This converter translates data transfer rates from the legacy IDE (UDMA mode 1) standard, used in older Parallel ATA devices, into the modern megabyte per second rate based on the SI decimal system.

How to Use This Tool?

Enter the data transfer value in IDE (UDMA mode 1) units
Select IDE (UDMA mode 1) as the input unit and megabyte/second (SI def.) as the output unit
Run the conversion to see the equivalent transfer rate in megabytes per second
Use the results to compare or report data transfer speeds with modern decimal units

Key Features

Converts legacy IDE (UDMA mode 1) transfer speeds to standardized megabyte per second (SI) units
Supports clear interpretation of older PATA device throughput alongside modern data rates
Includes examples for practical understanding of the conversion
Browser-based and easy to use with simple input and output
Helps users diagnose vintage hardware or benchmark older storage performance

Examples

2 IDE (UDMA mode 1) equals 50 Megabyte/second (SI def.)
0.5 IDE (UDMA mode 1) equals 12.5 Megabyte/second (SI def.)

Common Use Cases

Specifying or assessing BIOS or drive transfer settings on vintage PCs with older PATA devices
Benchmarking or documenting maximum throughput for legacy IDE hard disks or optical drives
Troubleshooting compatibility or data errors related to UDMA mode selection in legacy systems
Reporting sequential read/write speeds for modern storage devices in megabytes per second
Expressing file transfer speeds over interfaces like USB or Ethernet using decimal units

Tips & Best Practices

Use this converter when working with vintage hardware to translate transfer speeds into modern units
Apply results to clearly communicate performance metrics in engineering or repair settings
Remember this conversion reflects theoretical maximum rates, not guaranteed real-world throughput
Consult legacy hardware specifications for accurate diagnostics alongside conversion results
Ensure clarity by specifying the unit definition when reporting transfer rates, as SI differs from binary-based units

Limitations

The conversion is based on theoretical maximum raw transfer rates and may not reflect actual performance
IDE (UDMA mode 1) is a legacy mode with decreasing relevance as older hardware is phased out
Real-world data rates can be affected by overhead, cable quality, and controller compatibility
This converter does not cover other UDMA modes or non-PATA interfaces
Conversion values are fixed and do not adapt to specific hardware variations

Frequently Asked Questions

What does IDE (UDMA mode 1) represent?: IDE (UDMA mode 1) is an Ultra DMA transfer mode of the Parallel ATA interface, used mainly in older PATA devices, defining a theoretical maximum transfer rate of about 25 MB/s.
How is a megabyte/second (SI definition) different from other megabyte units?: A megabyte per second (SI def.) equals one million bytes transferred each second, based on decimal units, differing from binary-based mebibyte per second units.
Why convert from IDE (UDMA mode 1) to megabyte/second (SI)?: Converting to megabyte/second (SI) allows clearer comparison and reporting in standardized decimal units commonly used in modern data throughput metrics.

Key Terminology

IDE (UDMA mode 1): An Ultra DMA transfer mode for Parallel ATA interfaces in older devices, with a theoretical max transfer rate of approximately 25 megabytes per second.
Megabyte per second (SI def.): A unit of data transfer equal to one million bytes transferred each second, based on the decimal system.
PATA: Parallel ATA, an older standard interface for connecting storage devices such as hard drives and optical drives.

Quick Knowledge Check

What is the theoretical maximum transfer rate of IDE (UDMA mode 1)?

50 MB/s

25 MB/s

10 MB/s

What does a megabyte per second (SI) represent?

1,048,576 bytes per second

1,000,000 bytes per second

2,000,000 bytes per second

Why is converting IDE (UDMA mode 1) speeds useful?

To understand legacy device performance in modern terms

To increase data transfer speed

To change hardware settings automatically

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